Glaze Colours and Consistency

Are you ready for the next level of Understanding Glazes?

Pre-requisite: Understanding Glazes – How Glazes Work

This class is a level 2 class of my Understanding Glazes series. In order to take this class, you must have already taken the first class, “How Glazes Work”.


Class will be held at Coast Collective Arts Centre in Victoria, BC

I have teamed up with Coast Collective and will be offering my Understanding Glazes workshops at their Arts Centre in Colwood/Victoria. Click date to register.

Sat June 30 1:00-5:00pm


  • Examine in detail how colourants are affected by flux choice.
  • Use glaze calculation software to make flux and other material substitutions.
  • Live, step by step demonstration of how to measure specific gravity and viscosity so your glazes are always consistent
  • Learn how and when to flocculate and deflocculate your glazes.

In this class, we will review the basic concepts from the first class and then jump right into the chemistry of colourants. Our flux choice has a big impact on how the colourants react. You can get different shades, tones and even completely different colours from each colourant. I’ll display fired examples of some of the possibilities.

Then we will use glaze calculation software to take a recipe and substitute one flux for another, while keeping the basic chemistry of the glaze the same. You’re welcome to bring your laptop or mobile device and follow along (not required).

The second half of the class will be about specific gravity and viscosity. Measuring and maintaining a consistent specific gravity (water content) for each of your glazes is one of the most beneficial practices you can adopt in your studio. It takes the guesswork out of how much water to add to each glaze.

I’ll bring all the necessary equipment and a couple buckets of glaze to demonstrate how to measure specific gravity. Then we’ll adjust viscosity by either flocculating with Epsom salts or deflocculating with Darvan. The result of this practice is consistent, predictable glaze results.

Supply List:

Bring a tablet or laptop if you would like to follow along while we use glaze calculation software. (Optional)

If there is a specific glaze you have a question about, bring the recipe and an example to class. Time permitting, we will examine and analyze it as a group. (Optional)

Hope to see you there!

You gave a wonderful and well-prepared presentation! You have a very clear, friendly speaking voice and it is evident that you know a LOT about this topic and enjoy talking about it with an interested audience. Your teaching style is natural and engaging. Great job!

Kit Maloney

Workshop Participant

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